package com.example.sheetviewdemo;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.widget.ImageView;

public class RoundAngleImageView extends ImageView {

  private Paint paint;
  private int roundWidth = 5;
  private int roundHeight = 5;
  private Paint paint2;

  public RoundAngleImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init(context, attrs);
  }

  public RoundAngleImageView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init(context, attrs);
  }

  public RoundAngleImageView(Context context) {
    super(context);
    init(context, null);
  }
  
  private void init(Context context, AttributeSet attrs) {
    
    if(attrs != null) {   
      TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.RoundAngleImageView); 
      roundWidth= a.getDimensionPixelSize(R.styleable.RoundAngleImageView_roundWidth, roundWidth);
      roundHeight= a.getDimensionPixelSize(R.styleable.RoundAngleImageView_roundHeight, roundHeight);
    }else {
      float density = context.getResources().getDisplayMetrics().density;
      roundWidth = (int) (roundWidth*density);
      roundHeight = (int) (roundHeight*density);
    } 
    
    paint = new Paint();
    paint.setColor(Color.WHITE);
    paint.setAntiAlias(true);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_OUT));
    
    paint2 = new Paint();
    paint2.setXfermode(null);
  }
  
  @Override
  public void draw(Canvas canvas) {
    Bitmap bitmap = Bitmap.createBitmap(getWidth(), getHeight(), Config.ARGB_8888);
    Canvas canvas2 = new Canvas(bitmap);
    super.draw(canvas2);
    //drawLeftUp(canvas2);
    drawRightUp(canvas2);
    //drawLeftDown(canvas2);
    drawRightDown(canvas2);
    canvas.drawBitmap(bitmap, 0, 0, paint2);
    bitmap.recycle();
  }
  
  private void drawLeftUp(Canvas canvas) {
    Path path = new Path();
    path.moveTo(0, roundHeight);
    path.lineTo(0, 0);
    path.lineTo(roundWidth, 0);
    path.arcTo(new RectF(
        0, 
        0, 
        roundWidth*2, 
        roundHeight*2), 
        -90, 
        -90);
    path.close();
    canvas.drawPath(path, paint);
  }
  
  private void drawLeftDown(Canvas canvas) {
    Path path = new Path();
    path.moveTo(0, getHeight()-roundHeight);
    path.lineTo(0, getHeight());
    path.lineTo(roundWidth, getHeight());
    path.arcTo(new RectF(
        0, 
        getHeight()-roundHeight*2, 
        roundWidth*2, 
        getHeight()), 
        90, 
        90);
    path.close();
    canvas.drawPath(path, paint);
  }
  
  private void drawRightDown(Canvas canvas) {
    Path path = new Path();
    path.moveTo(getWidth()-roundWidth, getHeight());
    path.lineTo(getWidth(), getHeight());
    path.lineTo(getWidth(), getHeight()-roundHeight);
    path.arcTo(new RectF(
        getWidth()-roundWidth*2, 
        getHeight()-roundHeight*2, 
        getWidth(), 
        getHeight()), 0, 90);
    path.close();
    canvas.drawPath(path, paint);
  }
  
  private void drawRightUp(Canvas canvas) {
    Path path = new Path();
    path.moveTo(getWidth(), roundHeight);
    path.lineTo(getWidth(), 0);
    path.lineTo(getWidth()-roundWidth, 0);
    path.arcTo(new RectF(
        getWidth()-roundWidth*2, 
        0, 
        getWidth(), 
        0+roundHeight*2), 
        -90, 
        90);
    path.close();
    canvas.drawPath(path, paint);
  }

}
